It doesn't have any fire at the plugs. I tried all the connections with a test light The only place I can find power with a test light is the wire to the taillight.
I have a good wiring diagram: http://www.isd.net/ecurtis/st440a1.jpg
I tried the wire that comes from the mag and it didn't light the test light but it jolted me so bad I threw the light. It don't make any sense, if I can get jolted then it should light up my light.
My father is getting a puller for me so I can have a look at the magneto
And I tried the test light and it still works
Any power on the yellow wires to and from the voltage regulator. Sounds like it could be one of three switchs. The ignition switch, the kill switch or the throttle switch if Cats have them. I had similar problems in the past and it was corrosion in the connector plug coming from the engine.
The wiring diagram shows three coils the lighting coil is working according to what you said. the other coils go to the CDI ,If there are connectors on these two wires (red one and white one double check that the connection is there. You could use a multi-meter set on Ohms for that. It also might be a bad ground in the magneto.Brown wire. Good luck.
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